haight



(No Model.) 4 SheetsSheet 2. H. J. HAIGHT.

ELEOTRO MAGNETIC THERMOSGOPE.

No. 358,250. Patented Feb. g2, 1887.

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' 4 sheets-S eet 3. H. J. HAIGHT. ELECTED MAGNETIC THERMOSUQPE.

(No Model.)

No. 358,350. Patented Feb. 22, 1887.

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(No Model.) 4 Sheets-Sheet 4 H. J. HAIGHT. ELEGTRO MAGNETIC THERMOSGOPE.

Patented Feb. 22, 1887.

UNITED STATES PATENT Grrrcir.

HENRY JANSEN HAIGHT, OF 'NEW YORK, N. Y.

ELECTRO=MAGNETIC THERMOSCOPE.

SPECIFICATION forming part of Letters Patent No. 358,350, dated February 22, 1887.

Application filed June 17, 1885. Serial No. 168,951.

To all whom it may concern.-

Be it known that I, HENRY J ANSEN HAIGHT, of the city, county, and State'of New York, have invented Improvements in Electro-Magnetic Thermoscopes; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification. a

My present invention relates to improvements in electromagnetic thermoscopes, preferably such as are based upon the principles of construction and operation set forth in my Letters Patent No. 302,908, dated August 5, 1884:, and as to the transmitting thermo scope described in my Letters Patent No. 307,543, dated November 4, 1884, to which reference is here made that I may not have to give a lengthened description of the thermometric organization of the instrument; but it is obvious that it is not necessary I should limit the scope of my presentinvention to any construction therein described unnecessary to the purpose of the present improvements.

The leading design of these improvements is to produce a simplified and comparatively cheap instrument, which will indicate to a person present the temperature of the room, compartment, or place wherein the main instrument islocated, and also, if desired, sound an alarm therewhen a predetermined limit of high or low temperature has been reached, and which will at such times transmit by electrical means the alarm to any distant room, compartment, or place, indicatingthe limit of'high or low temperature. Thus it will be seen that in the present invention I do not employa distant receiving-thermoscope proper, but simply a distant alarm sounded by the transmittingthermoscope by means of electric currents traversing a connecting wire or wires.

I may here indicate some of the special 10- cations where the invention will be useful and desirable. First, the maininstrument may be located in a green or hot house, and the receiving or alarm instrument be placed in the gardeners lodge or the proprietors house. Again, for a reliable fire-alarm the transmitting-instrument may be located in any room or building liable to get on fire, or one in each of the rooms of a large building of any kind (No model.)

where there is liability of accidental taking fire, and the alarm-instrument be placed in any other room or place to be occupied by the person or persons intended to hear the alarm, there being also alarms connected with the main instruments in the rooms themselves, if

front view of a receiving alarm-instrument connected electrically with the main instrument by wires; Fig. 2, a front view, on alarger scale, of the interior of the main instrument, exhibiting the operative parts thereof; Fig. 3, a central vertical section of the same on the same scale as Fig. 2, in a plane cutting from front to rear; Fig. 4, a rear view of the instrument on the same scale as Fig. 1; Fig. 5, a bottom view of the battery-chamber connected with the main instrument, as shown in Fig. 1; Fig. 6, a bottom view of the removable front case of the battery-chamber in connection with the bottom of v the battery-chamber.

Like letters designate corresponding parts in all the figures.

The parts composing the transmitting-thermoscope are mounted on a board or plate, A,

preferably made of baked or dry wood or other non-conducting material, for convenience in insulating different metallic parts one from another. To this board first is secured the radial arm B, by means of an attachingplate, a, screwed to the board, and having the arm pivoted thereon, on which is fastened the inner end ofthe thermometrio coil 0, the upper end of the arm being adjustable by holdingscrews b b, turning in the arms 0 c of abracket, D, also screwed to the board. The projecting slotted arm (1 on the outer free end of the coil is coupled to the pin e on an arm, F of the rockshaft E, which carries the main or moving in dex G of the thermoscope on its forward end. This rock-shaft turns withina tubular bearing, f, on theprojecting end of a bracket, H,screwed or otherwise secured to the board in a proper position. In order to allow perfect freedom of movement to the rock-shaft E, and yet properly insulate it and the index thereon from other parts, particularly the high-temperature and low-temperature circuit-closing indexes I J used in connection with the main index, the said rock-shaft E turns in a tubular bush, 9, which may be of metal, insulated by surrounding it with an india-rubber or gutta-percha (or equivalent insulating) tube, It, which fits inside of the bearing f. Outside of this tubular bearing are mounted the high temperature and low-temperatu re indexes I J, one of them on another insnlating-tube 2 surrounding the bcaring in order to insulate the two indexes from each other, and one of them from the bearing and its bracket, while the other index immediately encircles or is in metallic connection with the said bearing and bracket. The coiled spring j, which (or its equivalent) is inserted between the two indexcs I J, is also insulated from one of theindexes by a suitable washer or plate, 7c, of insulating material, and between this index and the main index G is another plate or washer, Z, of insulating material. The thermometric scale K, to which the several indexes point, is preferably held by a plate, L, which is su pported by two posts, in WI, projecting forward from the board to which they are attached. This scale-itself may be marked on a card or tablet removable from the holding-plate, so that different scales may be inserted when desired, one scale being replacaeblc by another at will.

The high and low temperature indexes are set to the degrees on the scale desired, and a pin, )2, projects backward from the main index G far enough to touch either of the other indexes when the main index is moved in front of the same.

Now one of the features of my present invention is that of passing the electric alarmcurrents through the thermometric coil,thence through the main index and through one or the other of the high and low temperature indexes, when the circnitis closed by the pin a on the main index coming in contact with one of the said indexes, so as to sound the alarm-bell. or other means of alarm when either a high limit or lowlimit of temperature is reached. To complete the circuit organiza tion on this plan, three circuit-wires, q, connect the main instrument with the distant alarm-instrument, as shown in Fig. 1, 0 being the high-temperature wire and p the low-tent perature wire, and q the return-wire for both circuits, this part of the circuit being generally the eartl1,with aground-wire at each end. The wire q, common to the two circuits, may be called the battery-wire, since the battery is usually placed in this part of the circuit, so that one battery will serve for both circuits. This wire is connected directly with the coil, or with the bracket D, by which the carrying-arm of the coil is adjusted, or with both by a wire or electric way extending from its binding-postr thereto, as indicated in Figs. 2 and 4. The high-temperaturc circuit is continued through the instrument from the hightemperature index through a metallic disk or plate,s,in contact with the index,then through a short insulated wire, I, connected with the said disk and extending preferably back through the bracket H and the supportingboard A in or back of which the wire extends by any course to the binding-post a of the high-temperature wire 0. The low-tempera tnrc circuit is continued through the instrument from the low-tcmperature index,th rough the rock-shaft E, in contact with the index, tubularbearingf, and the bracket H, and from that through the board or back of it by a wire or metallic way, n, Fig. 4, extending by any course to the binding-post w of the low-temperature wire 22. It is of course immaterial, however, which circuit takes the particular course of the two specified, or whether just as described, or by any other equivalent in effect. It may be desirable, also, to provide this transmitting-instrument with an alarmbell for some purposes, if not for all, and I have shown such a bell, M, Figs. 1, 2, and 3, and in connection therewith two electro-magnets, N 0, one placed in the high-temperature circuit and the other in the low-temperature cir cult, as shown, each operating a hammer, x, to strikethe bell in the'usual manner of sounding bells by electric currents. The distantstation alarm P, Fig. 1, also has a bell, Q, similarly sounded by two electromagnets (not shown) and their hammers 313 the said elec' tro-magnets being, respectively, in the hightemperature and low -teuipcrature circuits. Instead of employing one alarm-bell in either place, two alarm-bells may be used, to be struck by the respective hammers, so that by having the two bells scaled to different tones, or otherwise giving different sounds, the listener can distinguish atonce which circuit is closed; but by the construction herein delineated a single alarm-bell sufficcs in each case, and circuit-breaking keys R S are placed in the respective circuits, so that by turning either key to break its circuit, as indicated by dotted lines in Figs. 1 and 2, the attendant can at once determine which circuit has been closed by the main index of the thermoscope.

An inclosing-case, T, protects the operative parts of the thermoscope, there being a glass-covered opening or window, a, in front of the scale and indexes, to allow the same to be viewed without removing the case. This case has sufficient apertures a a, in its sides, top, and bottom, through which the air may circulate freely, and thereby the temperature of the room, compartment, or place where the instrument is placed may quickly affect the coil within. The case is attached by hooks and eyes 11 b or equivalent means, whereby it ICC can be readily removed and again put in place. A tablet, c, is held by clips d d on the front side of the case, for recording any temperature reached or other fact of interest in connection with the instrument.

For convenience in settingand adjusting the high and low temperature indexes I J, eachis drawn laterally in one direction by a light coiled spring, 6, which is attached to a rod, f, mounted in a post, and held therein by a set-screw, 71/, as shown in Figs. 2 and 3, so that the rod may be adjustable endwise to vary the force of the spring, and in the opposite direction each index is moved by means of a turn-post, i, journaled in a bearing, j, attached to the supporting board, anda chain, metallic band, or cord, is, partly wound upon the tnrn-post, and extended therefrom to the index to which itis attached. The end of each turn-post is formed to receive a key for turning it, the key being inserted through a keyhole, Z, in the case. By this means either of the indexes is readily moved and adjusted.

I find it convenient to connect a battery directly with the main instrument, and also sometimes with the receiving alarm-instrument, as shown in Fig. 1. For this purpose, a separate and removable supporting board I or bracket, U, is employed, having a shelf, m, on which the cell or cells V of the battery may rest. by dotted linesin Fig. 1,) which fit into dowelholes in the lower end of the main board of the thermoscope or alarm, and is supported in place by a hook, 0, and pin or eye 1), so that it may be attached or removed at will. The poles or the battery are connected with binding-posts q q, one of which receives the end of the battery-wire coming from the instrument, and the other receives the groundwire of the same. For compactness, the board U may be cutaway on the inside to receive the rear side of the batterycell. An inclosingcase, NV, (shown in Figs. 5. and 6 and at the right hand in Fig. 1,) is employed to inclose the battery, being supported at the bottom by a tongue, r, on the under side of the batteryshelf, over which tongue a groove or notch, s, in the bottom of the case slides, and held at the sides by hooks and eyes.

The battery-board may be separately supported, so that either the battery or the thermoscope may be separated from the other, which remains in position. Thus I can at pleasure remove the battery and locate it in another place without disturbing the thermoscope or alarm; or I may remove the thermoscope or alarm and place it where it may be required without disturbing the battery; or I may use either the thermoscope or alarm with the battery. These instruments are made interchangeable, either fitting the same batteryboard.

I claim as my invention- 1. In an electromagnetic thermoscope, the combination of the main index, the high and This board has dowel-pins an', (shown Y low tem erature limit indexes insulated from one another, and high and low temperature electric circuits, the high and low temperature indexes being in the said electric circuits, and

the main index being in part of a circuit com-' mon to both the other indexes and adapted to close either circuit'by being brought into metallic or electro-conducting connection with one of the other indexes, substantially as and for the purpose herein specified.

2. The combination of the main index, the high and low temperature limit indexes,high and low temperature electric circuits, and a thermostatic coil in electro-conducting connection with the main index and in part of an electric circuit common to both the high and low temperature circuits, substantiallyas and for the purpose herein specified.

3. The combination of the main index G, high and low temperature electric circuits, the said index forming part of both circuits,

rock-shaft E, on which the said index is' mounted, and supporting-bracket H, havinga bearing, f, and metallic bush 9, in which the said rock-shaft turns, located within the said bracket-bearing and insulated therefrom, substantially as and for the purpose herein speci- 4. The combination of the bracket H, provided with a tubular bearing, f, tubular bush 9, located within and insulated from the said bearing, rock-shaft E, oscillating in the said bush, main index G, mounted on the rockshaft, index I, mounted on an insulating-tube, t, surrounding the bearing f, index J, in metallic connection with the said bearing, and washers k'Z between the indexes I, J, and G,

and completingthe insulation between them,

all substantially as and for the purpose herein specified.

5. The combination, with the high and low temperature limit indexes, of the drawingsprings e 6, adjustable spring-holding rodsf f, key turn-posts '6 z", and connecting chains, bands, or cords k 7c, substantially as described, whereby the indexes are adjusted to any limit of temperature required.

6. The combination, in ajtransmitting-thermoscope, of a main or current temperature index, high and low temperature limit indexes, an electric circuitelectrically connected with the high-temperature index, an electric circuit electrically connected with the low-tempera ture index, the main index being in the common return part of both circuits, and adapted to close either circuit by contact with one of the other indexes, and one or more alarms situated in the said electric circuits and adapted to sound when either a high or a low tempera- IIO ture limit is reached, for the purposes herein Witnesses:

O. S. NEWELL, M. E. HAIGHT. 

